EP 0274796 B1 19930519 - OPTICAL LIGHT WAVEGUIDE SWITCHING ELEMENT, AND SWITCHING MATRIX COMPOSED OF A MULTITUDE OF SUCH AN ELEMENT
Title (en)
OPTICAL LIGHT WAVEGUIDE SWITCHING ELEMENT, AND SWITCHING MATRIX COMPOSED OF A MULTITUDE OF SUCH AN ELEMENT
Publication
Application
Priority
FR 8618046 A 19861223
Abstract (en)
[origin: US4832432A] An optical switching element including two parallel optical guides G1 and G2 each constituted by a strip of a semiconductor material having a refractive index n1 formed on a semiconductor substrate having a lower refractive index n0, the switching operation being obtained by the effect of voltages applied to electrodes arranged in the switching zone, characterized in that the latter is constituted by a strip of the same semiconductor material as the guides, which extends between the latter over a coupling length D between the abscissae -D/2 and +D/2 indicated on the orientated longitudinal axis of symmetry, and in that the electrodes are at least three in number, of which a first electrode permits of applying a reference voltage to the substrate, a second electrode extends substantially at the surface of the second guide from the abscissa -D to the abscissa - epsilon , epsilon being small with respect to D, and a third electrode extends substantially at the surface of the first guide from the abscissa + epsilon to the abscissa +D, the second and third electrodes forming strips whose longitudinal axes of symmetry enclose with the optical axes of the second and first guides, respectively, an angle - theta defined on first approximation by the relation: theta 2 APPROX 2(n1-n0)/n1.
IPC 1-7
IPC 8 full level
G02B 6/12 (2006.01); G02F 1/313 (2006.01); H04B 10/00 (2013.01); H04B 10/27 (2013.01)
CPC (source: EP US)
G02F 1/3133 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0274796 A1 19880720; EP 0274796 B1 19930519; AU 611612 B2 19910613; AU 8293587 A 19880623; DE 3785923 D1 19930624; DE 3785923 T2 19930826; FR 2608783 A1 19880624; FR 2608783 B1 19890414; GR 890300008 T1 19890929; JP S63168633 A 19880712; US 4832432 A 19890523
DOCDB simple family (application)
EP 87202544 A 19871216; AU 8293587 A 19871222; DE 3785923 T 19871216; FR 8618046 A 19861223; GR 890300008 T 19890929; JP 32159987 A 19871221; US 13658187 A 19871222